| Computer Code: |
PLH |
Preferred Map Code: |
PlH |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
A markedly garnetiferous, heretogenous succession of crystal, pumice and lithic-rich massive beds, bedded silicic tuff and lapilli tuffs. |
| Definition of Lower Boundary: |
Taken at the abrupt change from andesite or volcaniclastic sandstone of the Birker Fell Andesite Formation to bedded silicic pyroclastic rocks. |
| Definition of Upper Boundary: |
Defined by the base of the Pinnacle Howe Member. |
| Thickness: |
To 65m |
| Geographical Limits: |
Haweswater, eastern Lake District. |
| Parent Unit: |
Whelter Knotts Tuff Formation (WLT)
|
| Previous Name(s): |
Powley's Hill Member [Obsolete Name and Code: Use PLH]
(-4260)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
The area west of Powley Hill, Naddle Forest, Haweswater, Cumbria. |
| Reference(s): |
| Beddoe-Stephens, B. 2000. The Borrowdale Volcanic Group between Haweswater and eastern Ullswater. British Geological Survey Technical Report WG/00/04. |
| Millward, D. 2002. Geology of the area between Haweswater and Shap. British Geological Survey Research Report RR/02/02. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E030
E039
|
